package com.admin.system.service.impl;

import com.admin.common.annotation.DataScope;
import com.admin.common.constant.UserConstants;
import com.admin.common.core.domain.Ztree;
import com.admin.common.exception.BusinessException;
import com.admin.common.utils.StringUtils;
import com.admin.system.domain.SysDept;
import com.admin.system.domain.SysRole;
import com.admin.system.mapper.SysDeptMapper;
import com.admin.system.service.ISysDeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * 部门管理 服务实现
 *
 * @author fangchen
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService {
    @Autowired
    private SysDeptMapper deptMapper;

    /**
     * 查询部门管理数据
     *
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept) {
        return deptMapper.selectDeptList( dept );
    }

    /**
     * 查询部门管理树
     *
     * @param dept 部门信息
     * @return 所有部门信息
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<Ztree> selectDeptTree(SysDept dept) {
        List<SysDept> deptList = deptMapper.selectDeptList( dept );
        List<Ztree> ztrees = initZtree( deptList );
        return ztrees;
    }

    /**
     * 根据角色ID查询部门（数据权限）
     *
     * @param role 角色对象
     * @return 部门列表（数据权限）
     */
    @Override
    public List<Ztree> roleDeptTreeData(SysRole role) {
        Long roleId = role.getRoleId();
        List<Ztree> ztrees = new ArrayList<Ztree>();
        List<SysDept> deptList = selectDeptList( new SysDept() );
        if (StringUtils.isNotNull( roleId )) {
            List<String> roleDeptList = deptMapper.selectRoleDeptTree( roleId );
            ztrees = initZtree( deptList, roleDeptList );
        } else {
            ztrees = initZtree( deptList );
        }
        return ztrees;
    }

    /**
     * 对象转部门树
     *
     * @param deptList 部门列表
     * @return 树结构列表
     */
    public List<Ztree> initZtree(List<SysDept> deptList) {
        return initZtree( deptList, null );
    }

    /**
     * 对象转部门树
     *
     * @param deptList     部门列表
     * @param roleDeptList 角色已存在菜单列表
     * @return 树结构列表
     */
    public List<Ztree> initZtree(List<SysDept> deptList, List<String> roleDeptList) {

        List<Ztree> ztrees = new ArrayList<Ztree>();
        boolean isCheck = StringUtils.isNotNull( roleDeptList );
        for (SysDept dept : deptList) {
            if (UserConstants.DEPT_NORMAL.equals( dept.getStatus() )) {
                Ztree ztree = new Ztree();
                ztree.setId( dept.getDeptId() );
                ztree.setpId( dept.getParentId() );
                ztree.setName( dept.getDeptName() );
                ztree.setTitle( dept.getDeptName() );
                if (isCheck) {
                    ztree.setChecked( roleDeptList.contains( dept.getDeptId() + dept.getDeptName() ) );
                }
                ztrees.add( ztree );
            }
        }
        return ztrees;
    }

    /**
     * 查询部门人数
     *
     * @param parentId 部门ID
     * @return 结果
     */
    @Override
    public int selectDeptCount(Long parentId) {
        SysDept dept = new SysDept();
        dept.setParentId( parentId );
        return deptMapper.selectDeptCount( dept );
    }

    /**
     * 查询部门是否存在用户
     *
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId) {
        int result = deptMapper.checkDeptExistUser( deptId );
        return result > 0 ? true : false;
    }

    /**
     * 删除部门管理信息
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId) {
        return deptMapper.deleteDeptById( deptId );
    }

    /**
     * 新增保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept) {
        SysDept info = deptMapper.selectDeptById( dept.getParentId() );
        // 如果父节点不为"正常"状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals( info.getStatus() )) {
            throw new BusinessException( "部门停用，不允许新增" );
        }
        dept.setAncestors( info.getAncestors() + "," + dept.getParentId() );
        return deptMapper.insertDept( dept );
    }

    /**
     * 修改保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    @Transactional
    public int updateDept(SysDept dept) {
        SysDept newParentDept = deptMapper.selectDeptById( dept.getParentId() );
        SysDept oldDept = selectDeptById( dept.getDeptId() );
        if (StringUtils.isNotNull( newParentDept ) && StringUtils.isNotNull( oldDept )) {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors( newAncestors );
            updateDeptChildren( dept.getDeptId(), newAncestors, oldAncestors );
        }
        int result = deptMapper.updateDept( dept );
        if (UserConstants.DEPT_NORMAL.equals( dept.getStatus() )) {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatus( dept );
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatus(SysDept dept) {
        String updateBy = dept.getUpdateBy();
        dept = deptMapper.selectDeptById( dept.getDeptId() );
        dept.setUpdateBy( updateBy );
        deptMapper.updateDeptStatus( dept );
    }

    /**
     * 修改子元素关系
     *
     * @param deptId       被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors) {
        List<SysDept> children = deptMapper.selectChildrenDeptById( deptId );
        for (SysDept child : children) {
            child.setAncestors( child.getAncestors().replace( oldAncestors, newAncestors ) );
        }
        if (children.size() > 0) {
            deptMapper.updateDeptChildren( children );
        }
    }

    /**
     * 根据部门ID查询信息
     *
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId) {
        return deptMapper.selectDeptById( deptId );
    }

    /**
     * 校验部门名称是否唯一
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public String checkDeptNameUnique(SysDept dept) {
        Long deptId = StringUtils.isNull( dept.getDeptId() ) ? -1L : dept.getDeptId();
        SysDept info = deptMapper.checkDeptNameUnique( dept.getDeptName(), dept.getParentId() );
        if (StringUtils.isNotNull( info ) && info.getDeptId().longValue() != deptId.longValue()) {
            return UserConstants.DEPT_NAME_NOT_UNIQUE;
        }
        return UserConstants.DEPT_NAME_UNIQUE;
    }
}
